公开(公告)号：US20210050967A1

公开(公告)日：2021-02-18

申请号：US16991809

申请日：2020-08-12

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Seyong Park ,  Peter Pui lok Ang

IPC: H04L5/00 ,  H04W72/04 ,  H04W72/02

Abstract: Methods, systems, and devices for wireless communications are described. A network may generate a pool of distinct base sequences for use with uplink messages from a user equipment (UE) to a base station, where each base sequence in the pool of distinct base sequences may have a peak to average power ratio below a threshold. A base station may assign the pool of distinct base sequences into groups of base sequences based on a group size and a hopping pattern reuse factor. The base station may assign the groups of base sequences to cells and signal the group size and a hopping pattern index to UEs in the cells. A UE in a cell may identify the group of base sequences assigned to the cell based on the signaled parameters and select a base sequence for use in transmitting an uplink message to the base station.

公开(公告)号：US10903965B2

公开(公告)日：2021-01-26

申请号：US16517305

申请日：2019-07-19

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Jing Sun ,  Xiao Feng Wang ,  Hao Xu ,  Tao Luo ,  Yi Huang ,  Renqiu Wang

IPC: H04L5/00 ,  H04J3/00 ,  H04L27/26

Abstract: Aspects of the disclosure relate to methods and apparatus of time-domain multiplexing (TDM) for reference signals (RS) and data using a modified cyclic prefix. A reference signal (RS) and data are multiplexed either in a single symbol or in two time consecutive symbols that respectively including the RS and data. The cyclic prefix (CP) is added to the single symbol using a portion of the RS or to a first symbol of the two time consecutive symbols using a portion of the RS. The CP may be copied from the RS or the end of the symbol, but not the data, in a manner that affords a virtual Time Division Multiplexing (TDM) of the RS and data before discrete Fourier transform (DFT) spreading is performed in a transceiver to provide lower peak to average power ratios and no Inter-symbol interference.

公开(公告)号：US20210014898A1

公开(公告)日：2021-01-14

申请号：US16803888

申请日：2020-02-27

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Wanshi Chen ,  Joseph Binamira Soriaga ,  Krishna Kiran Mukkavilli ,  Enoch Shiao-Kuang Lu ,  Seyong Park ,  Yisheng Xue

IPC: H04W74/08 ,  H04W74/00 ,  H04W72/04 ,  H04W72/12 ,  H04L5/10 ,  H04L5/00 ,  H04W76/27 ,  H04W56/00 ,  H04L1/18 ,  H04L1/00

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may generate an uplink random access message, including a random access preamble and an uplink shared channel resource unit, of a two-step random access procedure. The UE may identify configuration information for uplink control information (UCI) multiplexing. The UE may identify a trigger for inclusion of UCI with the uplink random access message. The UE may multiplex the UCI and a reference signal with the uplink shared channel resource unit and map the uplink control information to resource elements in the uplink shared channel resource unit based on a priority of the uplink control information and a location of resource elements to which the reference signal is mapped. The UE may transmit the uplink random access message comprising the uplink control information and an indication of the used UCI configuration to the base station.

公开(公告)号：US10862722B2

公开(公告)日：2020-12-08

申请号：US16263250

申请日：2019-01-31

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Renqiu Wang ,  Seyong Park ,  Naga Bhushan ,  Jay Kumar Sundararajan ,  Joseph Binamira Soriaga ,  Tingfang Ji

IPC: H04L27/26 ,  H04L25/02 ,  H04L5/00 ,  H04B7/0452 ,  H04J13/10 ,  H04W72/04 ,  H04J11/00 ,  H04L27/227 ,  H04J13/00 ,  H03M13/15 ,  H04L1/00 ,  H04B7/0413

Abstract: Methods, systems, and devices for wireless communications are described that provide for concurrent reference signal transmissions using common resources, such as demodulation reference signal (DMRS) transmissions, from a number of non-orthogonal multiple access (NOMA) transmitters. Different transmitters may use different sequences for reference signal transmissions, which may allow a receiver, such as a wireless base station, to decode the reference signal transmissions for each NOMA transmitter and perform channel estimation for each NOMA transmitter. The reference signal transmissions may be asynchronous with a bounded timing offset or quasi-synchronous, and the reference signal sequence selection may provide for relatively reliable channel estimation and coherent demodulation.

公开(公告)号：US20200314911A1

公开(公告)日：2020-10-01

申请号：US16785360

申请日：2020-02-07

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Seyong Park ,  Wei Yang

IPC: H04W74/08 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) to adjust a random access message that is transmitted to a base station in an asynchronous uplink transmission. The UE may use a constrained mapping of time and frequency resources for the random access message or transmit all portions of the message in a continuous transmission. The UE may also adjust the timing of the portions of the message. The base station may use a portion of the message, such as a preamble, to perform channel estimation for another portion of the message, such as a payload, to improve decoding of the transmitted message. Additionally, the UE may configure a waveform of the message to improve the continuous transmission of the message, for example by reducing interference between portions of the message.

公开(公告)号：US20200260485A1

公开(公告)日：2020-08-13

申请号：US16778956

申请日：2020-01-31

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Linhai He ,  Hung Dinh Ly ,  Seyong Park ,  Naga Bhushan ,  Ying Wang ,  Wanshi Chen ,  Joseph Binamira Soriaga

IPC: H04W74/08 ,  H04W72/14 ,  H04W24/08 ,  H04L5/00 ,  H04L1/18 ,  H04W80/02 ,  H04L5/10 ,  H04W76/27

Abstract: Fallback procedures for user equipments (UEs) are described that provide efficient fallback to a four-step random access procedure from a two-step random access procedure. For example, after transmitting a first message of a two-step random access procedure, a UE may start a fallback timer or counter and monitor for a second message of the two-step random access procedure for the duration of the fallback timer or counter. At the expiration of the fallback timer or counter, the UE may fall back to a four-step random access procedure. In some cases, the UE may transmit multiple repetitions of the first message and monitor for responses after transmitting the repetitions or after each repetition. Additionally or alternatively, the base station may transmit an explicit signal to the UE that may signal to the UE to perform a fallback procedure at a beginning or middle of a random access procedure.

公开(公告)号：US20200252880A1

公开(公告)日：2020-08-06

申请号：US16735318

申请日：2020-01-06

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Jay Kumar Sundararajan ,  Linhai He ,  Seyong Park ,  Yi Huang ,  Hung Dinh Ly ,  Tingfang Ji ,  Joseph Binamira Soriaga ,  Naga Bhushan

IPC: H04W52/14 ,  H04W74/08 ,  H04W52/24 ,  H04L5/00 ,  H04L1/00 ,  H04W72/04 ,  H04W76/27 ,  H04W52/36 ,  H04W24/08 ,  H04W52/10

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive system information from a base station indicating at least one configuration rule for power control parameter setting for random access. The UE may measure one or more reference signals and may estimate a path loss of wireless communications between the base station and the UE based on the measured reference signals. The UE may select one or more parameters from one or more sets of parameters indicated in the configuration rule. The UE may select a first transmit power for a preamble of a random access message and a second transmit power for a payload of the random access message, based on the estimated path loss and the configuration rule for power control parameters and power ramping procedures. The UE may transmit the random access message according to the selected first and second transmit powers.

公开(公告)号：US10728000B2

公开(公告)日：2020-07-28

申请号：US16238268

申请日：2019-01-02

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Seyong Park ,  Renqiu Wang ,  Jing Jiang ,  Joseph Binamira Soriaga ,  Tingfang Ji ,  Naga Bhushan ,  Yi Huang ,  Ying Wang

IPC: H04L5/00 ,  H04L27/06 ,  H04L27/26 ,  H04W76/28 ,  H04W76/27 ,  H04J13/00 ,  H04J11/00

Abstract: Methods, systems, and devices for wireless communications are described that provide a number of groups of transmitters, each group of transmitters having at least one user equipment (UE), and each group of transmitters having an associated transmission opportunity (TXO) for transmission of a reference signal. A number of UEs may transmit transmissions to a base station according to non-orthogonal multiple access (NOMA) techniques in which two or more UEs concurrently transmit to the base station. Depending upon a number of UEs, a number of groups of transmitters, an overloading factor of NOMA transmissions, a system bandwidth, a time span of the reference signal TXO, or any combination thereof, a binary or non-binary orthogonal cover code (OCC) may be applied to transmitted reference signals, which the base station may use to identify reference signals from particular UEs.

公开(公告)号：US10708020B2

公开(公告)日：2020-07-07

申请号：US16010001

申请日：2018-06-15

Applicant: QUALCOMM Incorporated

Inventor： Renqiu Wang ,  Yi Huang ,  Hao Xu ,  Tingfang Ji ,  Seyong Park

IPC: H04L5/00 ,  H04L27/26 ,  H04L25/02 ,  H04L5/14 ,  H04W72/04 ,  H04W72/08

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for short uplink burst designs. In some cases, one sequence, from a plurality of sequences, may be transmitted in multiple tones of at least one short burst symbol conveying at least one bit of information. The plurality of sequences may have the same values at a first set of common tone locations for demodulation reference signals (DMRS) and groups of sequences from the plurality of sequences may be identified, each sequence in a group having a second set of common tone locations for DMRS.

公开(公告)号：US10680782B2

公开(公告)日：2020-06-09

申请号：US15975638

申请日：2018-05-09

Applicant: QUALCOMM Incorporated

Inventor： Yi Huang ,  Renqiu Wang ,  Hao Xu ,  Seyong Park

IPC: H04W72/04 ,  H04L5/00 ,  H04L1/18 ,  H04W72/14

Abstract: Aspects of the disclosure relate to implied and explicit mapping of uplink (UL) resources for acknowledgment communications from a user equipment (UE). In some examples disclosed herein, implied mapping may include indexing of information elements in a downlink (DL) communication. The explicit mapping may include information elements in the DL communication configured to explicitly provide a location of an UL resource. Other aspects, embodiments, and features are also claimed and described.